watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5555c

File Size

376.01 MB

Release Date

2018-05-01T17:07:05Z

Update Type

Normal release

Delta update - requires 4.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm, LTE) →

About This Update

watchOS 4.3.1 (build 15T5555c) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-05-01T17:07:05Z. The update package is 376.01 MB. This is a delta (partial) update that requires 4.1 to already be installed on the device - it cannot be applied from scratch. This update is no longer signed by Apple, meaning it can no longer be downloaded and applied on-device through Settings.

The OTA payload file is 187fa1fe79c316e6b19fde11b34e2ce47160994d.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-81192-20180430-37D5B296-495D-11E8-85F9-FB18D91E7F63/com_apple_MobileAsset_SoftwareUpdate/187fa1fe79c316e6b19fde11b34e2ce47160994d.zip